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为了适应电站锅炉燃煤种类多变和低负荷燃烧稳定的要求，提出了一种新的浓淡偏差的燃烧方式——煤粉浓度连续可调的叶片式燃烧器。本文重点叙述了叶片角度从α＝０°～６０°变化时，气流平均速度分布从比较均匀，变成有较大的速度差，从而形成双峰式的速度分布，并形成一定的回流区；不仅如此，气流的湍流参数，如湍动能，也随着叶片角的增大，几乎成直线地增加，特别是α＝０°～３５°时比较明显。这些参数的变化，对于强化煤粉气流的热质交换和火焰稳定都是非常有利的。
In order to adapt to the variety of coal-fired boilers and the stability of low-load combustion, a new combustion method of concentration deviation is proposed, which is a continuously variable vane burner with pulverized coal concentration. In this paper, the change of the blade angle from α = 0 ° to 60 ° is mainly described. The average velocity distribution of air flow changes from more uniform to larger velocity difference, resulting in a bimodal velocity distribution and a certain recirculation zone. Moreover, the turbulent parameters of the gas flow, such as the turbulent kinetic energy, increase almost linearly with the increase of the blade angle, especially when α = 0 ° ~ 35 °. Changes in these parameters are very beneficial for enhancing the heat and mass exchange and flame stabilization of the pulverized coal flow.